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          <h1 class="post-title" itemprop="name headline">tempus_fugit靶机渗透要点记录</h1>
        

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        <p><em>首先这次靶机一部分都是参考这位小哥的博客，这篇文章对关键点进行实际操作，并记录以备忘记。</em><br><a href="https://mzfr.github.io/vulnhub-writeups/2019-08-14-fugit" target="_blank" rel="noopener">https://mzfr.github.io/vulnhub-writeups/2019-08-14-fugit</a></p>
<ol>
<li><p>首先是在主页的upload页面存在命令注入，确实没有想到，这必须看到源码才能利用，fuzz的话他有一个302，也不好利用。这里贴一下后面搞到的源码</p>
 <figure class="highlight python"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br><span class="line">49</span><br><span class="line">50</span><br><span class="line">51</span><br><span class="line">52</span><br><span class="line">53</span><br><span class="line">54</span><br><span class="line">55</span><br><span class="line">56</span><br><span class="line">57</span><br><span class="line">58</span><br><span class="line">59</span><br><span class="line">60</span><br><span class="line">61</span><br><span class="line">62</span><br><span class="line">63</span><br><span class="line">64</span><br><span class="line">65</span><br><span class="line">66</span><br><span class="line">67</span><br><span class="line">68</span><br><span class="line">69</span><br><span class="line">70</span><br><span class="line">71</span><br><span class="line">72</span><br><span class="line">73</span><br><span class="line">74</span><br><span class="line">75</span><br><span class="line">76</span><br><span class="line">77</span><br><span class="line">78</span><br><span class="line">79</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">import</span> os</span><br><span class="line"><span class="keyword">import</span> urllib.request</span><br><span class="line"><span class="keyword">from</span> flask <span class="keyword">import</span> Flask, flash, request, redirect, render_template</span><br><span class="line"><span class="keyword">from</span> ftplib <span class="keyword">import</span> FTP</span><br><span class="line"><span class="keyword">import</span> subprocess</span><br><span class="line"></span><br><span class="line">UPLOAD_FOLDER = <span class="string">'upload'</span></span><br><span class="line">ALLOWED_EXTENSIONS = &#123;</span><br><span class="line"><span class="string">'txt'</span>,</span><br><span class="line"><span class="string">'rtf'</span></span><br><span class="line">&#125;</span><br><span class="line">app = Flask(__name__)</span><br><span class="line">app.secret_key = <span class="string">"mofosecret"</span></span><br><span class="line">app.config[<span class="string">'MAX_CONTENT_LENGTH'</span>] = <span class="number">2</span> * <span class="number">1024</span> * <span class="number">1024</span></span><br><span class="line"></span><br><span class="line"><span class="meta">@app.route('/', defaults = &#123;</span></span><br><span class="line"><span class="string">'path'</span>: <span class="string">''</span></span><br><span class="line">&#125;)</span><br><span class="line"><span class="meta">@app.route('/&lt;path:path&gt;')</span></span><br><span class="line"><span class="function"><span class="keyword">def</span> <span class="title">catch_all</span><span class="params">(path)</span>:</span></span><br><span class="line">    cmd = <span class="string">'fortune -o'</span></span><br><span class="line">    result = subprocess.check_output(cmd, shell = <span class="literal">True</span>)</span><br><span class="line">    <span class="keyword">return</span> <span class="string">"&lt;h1&gt;400 - Sorry. I didn't find what you where looking for.&lt;/h1&gt; &lt;h2&gt;Maybe this will cheer you up:&lt;/h2&gt;&lt;h3&gt;"</span> + result.decode(<span class="string">"utf-8"</span>) + <span class="string">"&lt;/h3&gt;"</span></span><br><span class="line"></span><br><span class="line"><span class="meta">@app.errorhandler(500)</span></span><br><span class="line"><span class="function"><span class="keyword">def</span> <span class="title">internal_error</span><span class="params">(error)</span>:</span></span><br><span class="line">    <span class="keyword">return</span> <span class="string">"&lt;h1&gt;500?! - What are you trying to do here?!&lt;/h1&gt;"</span></span><br><span class="line"></span><br><span class="line"><span class="meta">@app.route('/')</span></span><br><span class="line"><span class="function"><span class="keyword">def</span> <span class="title">home</span><span class="params">()</span>:</span></span><br><span class="line">    <span class="keyword">return</span> render_template(<span class="string">'index.html'</span>)</span><br><span class="line"></span><br><span class="line"><span class="meta">@app.route('/upload')</span></span><br><span class="line"><span class="function"><span class="keyword">def</span> <span class="title">upload_form</span><span class="params">()</span>:</span></span><br><span class="line">    <span class="keyword">try</span>:</span><br><span class="line">        <span class="keyword">return</span> render_template(<span class="string">'my-form.html'</span>)</span><br><span class="line">    <span class="keyword">except</span> Exception <span class="keyword">as</span> e:</span><br><span class="line">        <span class="keyword">return</span> render_template(<span class="string">"500.html"</span>, error = str(e))</span><br><span class="line"></span><br><span class="line"><span class="function"><span class="keyword">def</span> <span class="title">allowed_file</span><span class="params">(filename)</span>:</span></span><br><span class="line">    check = filename.rsplit(<span class="string">'.'</span>, <span class="number">1</span>)[<span class="number">1</span>].lower()</span><br><span class="line">    check = check[: <span class="number">3</span>] <span class="keyword">in</span> ALLOWED_EXTENSIONS</span><br><span class="line">    <span class="keyword">return</span> check</span><br><span class="line"></span><br><span class="line"><span class="meta">@app.route('/upload', methods = ['POST'])</span></span><br><span class="line"><span class="function"><span class="keyword">def</span> <span class="title">upload_file</span><span class="params">()</span>:</span></span><br><span class="line">    <span class="keyword">if</span> request.method == <span class="string">'POST'</span>:</span><br><span class="line">        <span class="keyword">if</span> <span class="string">'file'</span> <span class="keyword">not</span> <span class="keyword">in</span> request.files:</span><br><span class="line">            flash(<span class="string">'No file part'</span>)</span><br><span class="line">            <span class="keyword">return</span> redirect(request.url)</span><br><span class="line"></span><br><span class="line">    file = request.files[<span class="string">'file'</span>]</span><br><span class="line"></span><br><span class="line">    <span class="keyword">if</span> file.filename == <span class="string">''</span>:</span><br><span class="line">        flash(<span class="string">'No file selected for uploading'</span>)</span><br><span class="line">        <span class="keyword">return</span> redirect(request.url)</span><br><span class="line"></span><br><span class="line">    <span class="keyword">if</span> file.filename <span class="keyword">and</span> allowed_file(file.filename):</span><br><span class="line">        filename = file.filename</span><br><span class="line">        file.save(os.path.join(UPLOAD_FOLDER, filename))</span><br><span class="line">        cmd = <span class="string">"cat "</span> + UPLOAD_FOLDER + <span class="string">"/"</span> + filename</span><br><span class="line">        result = subprocess.check_output(cmd, shell = <span class="literal">True</span>)<span class="comment">#&lt;===存在命令注入</span></span><br><span class="line">        flash(result.decode(<span class="string">"utf-8"</span>))</span><br><span class="line">        flash(<span class="string">'File successfully uploaded'</span>)</span><br><span class="line">        <span class="keyword">try</span>:</span><br><span class="line">            ftp = FTP(<span class="string">'ftp.mofo.pwn'</span>)</span><br><span class="line">            ftp.login(<span class="string">'someuser'</span>, <span class="string">'b232a4da4c104798be4613ab76d26efda1a04606'</span>)<span class="comment">#&lt;===这里在后面会用到</span></span><br><span class="line">            <span class="keyword">with</span> open(UPLOAD_FOLDER + <span class="string">"/"</span> + filename, <span class="string">'rb'</span>) <span class="keyword">as</span> f:</span><br><span class="line">                ftp.storlines(<span class="string">'STOR %s'</span> % filename, f)</span><br><span class="line">                ftp.quit()</span><br><span class="line">        <span class="keyword">except</span>:</span><br><span class="line">            flash(<span class="string">"Cannot connect to FTP-server"</span>)</span><br><span class="line">            <span class="keyword">return</span> redirect(<span class="string">'/upload'</span>)</span><br><span class="line">    <span class="keyword">else</span> :</span><br><span class="line">        flash(<span class="string">'Allowed file types are txt and rtf'</span>)</span><br><span class="line">        <span class="keyword">return</span> redirect(request.url)</span><br><span class="line"></span><br><span class="line"><span class="keyword">if</span> __name__ == <span class="string">"__main__"</span>:</span><br><span class="line">    app.run()</span><br></pre></td></tr></table></figure>
</li>
<li><p>存在命令注入首先想到反弹shell，并且通过<code>whoami</code>查看当前用户为<code>root</code>，尝试了一般的方法没有成功。这里看到将ip转为10进制就可以成功反弹。</p>
 <figure class="highlight python"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br></pre></td><td class="code"><pre><span class="line">ip = input(<span class="string">"请输入IP地址："</span>)</span><br><span class="line">lists = ip.split(<span class="string">"."</span>)</span><br><span class="line">string = <span class="string">""</span></span><br><span class="line"><span class="keyword">for</span> i <span class="keyword">in</span> lists:</span><br><span class="line">    string = string+hex(int(i))[<span class="number">2</span>:]</span><br><span class="line">string = <span class="string">"0x"</span>+string</span><br><span class="line">print(int(string,<span class="number">16</span>))</span><br></pre></td></tr></table></figure>
<p> <img src="https://imgconvert.csdnimg.cn/aHR0cHM6Ly9yYXcuZ2l0aHVidXNlcmNvbnRlbnQuY29tL3NyYXQxOTk5L1BpY3R1cmVzL21hc3Rlci8vaW1nL1NuaXBhc3RlXzIwMTktMTItMDFfMTAtNDktMDEucG5n?x-oss-process=image/format,png" alt></p>
</li>
<li><p>因为反弹过来的shell直接是root权限，直接到<code>/root</code>目录。在<code>/root</code>目录下没有发现flag.需要注意的是这个文件夹。<br> <img src="https://imgconvert.csdnimg.cn/aHR0cHM6Ly9yYXcuZ2l0aHVidXNlcmNvbnRlbnQuY29tL3NyYXQxOTk5L1BpY3R1cmVzL21hc3Rlci8vaW1nL1NuaXBhc3RlXzIwMTktMTItMDFfMTAtNTMtMTgucG5n?x-oss-process=image/format,png" alt><br> cd到这个文件夹<br> <img src="https://imgconvert.csdnimg.cn/aHR0cHM6Ly9yYXcuZ2l0aHVidXNlcmNvbnRlbnQuY29tL3NyYXQxOTk5L1BpY3R1cmVzL21hc3Rlci8vaW1nL1NuaXBhc3RlXzIwMTktMTItMDFfMTAtNTUtMDQucG5n?x-oss-process=image/format,png" alt><br> 在<code>172.19.0.12</code>开放ftp服务，用在源码中获得的<code>someuser:b232a4da4c104798be4613ab76d26efda1a04606</code>登陆ftp。可以看到<code>cmscreds.txt</code><br> [外链图片转存失败,源站可能有防盗链机制,建议将图片保存下来直接上传(img-k13iyn1q-1575172090619)(<a href="https://mzfr.github.io/vulnhub-writeups/images/fugit/ftp.png)]" target="_blank" rel="noopener">https://mzfr.github.io/vulnhub-writeups/images/fugit/ftp.png)]</a><br> 得到cms后台密码：<br> <img src="https://imgconvert.csdnimg.cn/aHR0cHM6Ly9temZyLmdpdGh1Yi5pby92dWxuaHViLXdyaXRldXBzL2ltYWdlcy9mdWdpdC9mdHAucG5n?x-oss-process=image/format,png" alt><br> 所以现在的目标就是找到所谓的<code>CMS</code>。</p>
</li>
<li><p>这里需要想到以当前机器为跳板，对172.19.0.0网段进行主机发现。<br> [外链图片转存失败,源站可能有防盗链机制,建议将图片保存下来直接上传(img-0iwL8aAn-1575172090621)(<a href="https://mzfr.github.io/vulnhub-writeups/images/fugit/subnet.png)]" target="_blank" rel="noopener">https://mzfr.github.io/vulnhub-writeups/images/fugit/subnet.png)]</a><br> 四个主机存活。</p>
<p> 在172.19.0.1发现开放80和8080代理。需要端口转发。<br> <img src="https://imgconvert.csdnimg.cn/aHR0cHM6Ly9temZyLmdpdGh1Yi5pby92dWxuaHViLXdyaXRldXBzL2ltYWdlcy9mdWdpdC9ubWFwLTIucG5n?x-oss-process=image/format,png" alt></p>
</li>
<li><p>以当前<code>bsah-4.4</code>作为跳板，将内网<code>172.19.0.1:8080</code>转发到本地<code>8080</code>端口。MSF生成meterpreter。<br> <img src="https://imgconvert.csdnimg.cn/aHR0cHM6Ly9yYXcuZ2l0aHVidXNlcmNvbnRlbnQuY29tL3NyYXQxOTk5L1BpY3R1cmVzL21hc3Rlci8vaW1nL1NuaXBhc3RlXzIwMTktMTItMDFfMTEtMDItNTEucG5n?x-oss-process=image/format,png" alt><br> <img src="https://imgconvert.csdnimg.cn/aHR0cHM6Ly9yYXcuZ2l0aHVidXNlcmNvbnRlbnQuY29tL3NyYXQxOTk5L1BpY3R1cmVzL21hc3Rlci8vaW1nL1NuaXBhc3RlXzIwMTktMTItMDFfMTEtMDMtMTcucG5n?x-oss-process=image/format,png" alt><br> 将nginx进程kill，端口转发。<br> <img src="https://imgconvert.csdnimg.cn/aHR0cHM6Ly9yYXcuZ2l0aHVidXNlcmNvbnRlbnQuY29tL3NyYXQxOTk5L1BpY3R1cmVzL21hc3Rlci8vaW1nL1NuaXBhc3RlXzIwMTktMTItMDFfMTEtMDYtMDYucG5n?x-oss-process=image/format,png" alt><br> 此时访问本地<code>8080</code>会出现debian默认apache服务页面。说明端口转发成功。<br> <img src="https://imgconvert.csdnimg.cn/aHR0cHM6Ly9yYXcuZ2l0aHVidXNlcmNvbnRlbnQuY29tL3NyYXQxOTk5L1BpY3R1cmVzL21hc3Rlci8vaW1nL1NuaXBhc3RlXzIwMTktMTEtMzBfMjItMzItMjIucG5n?x-oss-process=image/format,png" alt></p>
</li>
<li><p>在源码中看到存在<code>ftp.mofo.pwn</code></p>
 <figure class="highlight python"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">ftp = FTP(<span class="string">'ftp.mofo.pwn'</span>)</span><br></pre></td></tr></table></figure>
<p> 跳板机<code>dig</code>(这里需要安装dig，没有成功，直接借图)<br> <img src="https://imgconvert.csdnimg.cn/aHR0cHM6Ly9temZyLmdpdGh1Yi5pby92dWxuaHViLXdyaXRldXBzL2ltYWdlcy9mdWdpdC9kb21haW5zLnBuZw?x-oss-process=image/format,png" alt></p>
</li>
<li><p>看到<code>ourcms.mofo.pwn</code>解析到<code>172.19.0.1</code>正好是我们端口转发的地址。需要改一下<code>/etc/hosts</code>.</p>
 <figure class="highlight shell"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">127.0.0.1  ourcms.mofo.pwn</span><br></pre></td></tr></table></figure>
<p> 访问<code>ourcms.mofo.pwn:8080</code><br> 看到成功解析。找到<code>/admin</code>后台，用之前的<code>admin:hardEnough4u</code>登陆后台。后台可编辑主题，getshell。</p>
</li>
<li><p>本地提权需要用到<code>responder</code>抓取明文密码</p>
 <figure class="highlight shell"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">responder -I eth0</span><br></pre></td></tr></table></figure>
<p> <img src="https://imgconvert.csdnimg.cn/aHR0cHM6Ly9yYXcuZ2l0aHVidXNlcmNvbnRlbnQuY29tL3NyYXQxOTk5L1BpY3R1cmVzL21hc3Rlci8vaW1nL1NuaXBhc3RlXzIwMTktMTEtMzBfMjMtMjctNTgucG5n?x-oss-process=image/format,png" alt></p>
</li>
<li><p>登陆sidone，翻阅<code>/var/mail</code>,找到<code>radoslav:9e4lw0r82kv5</code>，再次<code>su</code>到<code>radoslav</code>用户。<br> <img src="https://imgconvert.csdnimg.cn/aHR0cHM6Ly9yYXcuZ2l0aHVidXNlcmNvbnRlbnQuY29tL3NyYXQxOTk5L1BpY3R1cmVzL21hc3Rlci8vaW1nL1NuaXBhc3RlXzIwMTktMTItMDFfMTEtMzYtNTIucG5n?x-oss-process=image/format,png" alt></p>
</li>
</ol>
<ol start="9">
<li><p>在<a href="https://gtfobins.github.io/gtfobins/ip/" target="_blank" rel="noopener">这个网站</a>找到<code>ip</code>提权方法。</p>
 <figure class="highlight shell"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br></pre></td><td class="code"><pre><span class="line">sudo ip netns add foo</span><br><span class="line">sudo ip netns exec foo /bin/sh</span><br><span class="line">sudo ip netns delete foo</span><br></pre></td></tr></table></figure>
</li>
<li><p>getflag<br><img src="https://imgconvert.csdnimg.cn/aHR0cHM6Ly9yYXcuZ2l0aHVidXNlcmNvbnRlbnQuY29tL3NyYXQxOTk5L1BpY3R1cmVzL21hc3Rlci8vaW1nL1NuaXBhc3RlXzIwMTktMTItMDFfMTEtNDEtMDQucG5n?x-oss-process=image/format,png" alt><br><img src="https://imgconvert.csdnimg.cn/aHR0cHM6Ly9yYXcuZ2l0aHVidXNlcmNvbnRlbnQuY29tL3NyYXQxOTk5L1BpY3R1cmVzL21hc3Rlci8vaW1nL1NuaXBhc3RlXzIwMTktMTItMDFfMTEtNDEtMTUucG5n?x-oss-process=image/format,png" alt></p>
</li>
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    var path = "/" + search_path;
    // monitor main search box;

    var onPopupClose = function (e) {
      $('.popup').hide();
      $('#local-search-input').val('');
      $('.search-result-list').remove();
      $('#no-result').remove();
      $(".local-search-pop-overlay").remove();
      $('body').css('overflow', '');
    }

    function proceedsearch() {
      $("body")
        .append('<div class="search-popup-overlay local-search-pop-overlay"></div>')
        .css('overflow', 'hidden');
      $('.search-popup-overlay').click(onPopupClose);
      $('.popup').toggle();
      var $localSearchInput = $('#local-search-input');
      $localSearchInput.attr("autocapitalize", "none");
      $localSearchInput.attr("autocorrect", "off");
      $localSearchInput.focus();
    }

    // search function;
    var searchFunc = function(path, search_id, content_id) {
      'use strict';

      // start loading animation
      $("body")
        .append('<div class="search-popup-overlay local-search-pop-overlay">' +
          '<div id="search-loading-icon">' +
          '<i class="fa fa-spinner fa-pulse fa-5x fa-fw"></i>' +
          '</div>' +
          '</div>')
        .css('overflow', 'hidden');
      $("#search-loading-icon").css('margin', '20% auto 0 auto').css('text-align', 'center');

      $.ajax({
        url: path,
        dataType: isXml ? "xml" : "json",
        async: true,
        success: function(res) {
          // get the contents from search data
          isfetched = true;
          $('.popup').detach().appendTo('.header-inner');
          var datas = isXml ? $("entry", res).map(function() {
            return {
              title: $("title", this).text(),
              content: $("content",this).text(),
              url: $("url" , this).text()
            };
          }).get() : res;
          var input = document.getElementById(search_id);
          var resultContent = document.getElementById(content_id);
          var inputEventFunction = function() {
            var searchText = input.value.trim().toLowerCase();
            var keywords = searchText.split(/[\s\-]+/);
            if (keywords.length > 1) {
              keywords.push(searchText);
            }
            var resultItems = [];
            if (searchText.length > 0) {
              // perform local searching
              datas.forEach(function(data) {
                var isMatch = false;
                var hitCount = 0;
                var searchTextCount = 0;
                var title = data.title.trim();
                var titleInLowerCase = title.toLowerCase();
                var content = data.content.trim().replace(/<[^>]+>/g,"");
                var contentInLowerCase = content.toLowerCase();
                var articleUrl = decodeURIComponent(data.url);
                var indexOfTitle = [];
                var indexOfContent = [];
                // only match articles with not empty titles
                if(title != '') {
                  keywords.forEach(function(keyword) {
                    function getIndexByWord(word, text, caseSensitive) {
                      var wordLen = word.length;
                      if (wordLen === 0) {
                        return [];
                      }
                      var startPosition = 0, position = [], index = [];
                      if (!caseSensitive) {
                        text = text.toLowerCase();
                        word = word.toLowerCase();
                      }
                      while ((position = text.indexOf(word, startPosition)) > -1) {
                        index.push({position: position, word: word});
                        startPosition = position + wordLen;
                      }
                      return index;
                    }

                    indexOfTitle = indexOfTitle.concat(getIndexByWord(keyword, titleInLowerCase, false));
                    indexOfContent = indexOfContent.concat(getIndexByWord(keyword, contentInLowerCase, false));
                  });
                  if (indexOfTitle.length > 0 || indexOfContent.length > 0) {
                    isMatch = true;
                    hitCount = indexOfTitle.length + indexOfContent.length;
                  }
                }

                // show search results

                if (isMatch) {
                  // sort index by position of keyword

                  [indexOfTitle, indexOfContent].forEach(function (index) {
                    index.sort(function (itemLeft, itemRight) {
                      if (itemRight.position !== itemLeft.position) {
                        return itemRight.position - itemLeft.position;
                      } else {
                        return itemLeft.word.length - itemRight.word.length;
                      }
                    });
                  });

                  // merge hits into slices

                  function mergeIntoSlice(text, start, end, index) {
                    var item = index[index.length - 1];
                    var position = item.position;
                    var word = item.word;
                    var hits = [];
                    var searchTextCountInSlice = 0;
                    while (position + word.length <= end && index.length != 0) {
                      if (word === searchText) {
                        searchTextCountInSlice++;
                      }
                      hits.push({position: position, length: word.length});
                      var wordEnd = position + word.length;

                      // move to next position of hit

                      index.pop();
                      while (index.length != 0) {
                        item = index[index.length - 1];
                        position = item.position;
                        word = item.word;
                        if (wordEnd > position) {
                          index.pop();
                        } else {
                          break;
                        }
                      }
                    }
                    searchTextCount += searchTextCountInSlice;
                    return {
                      hits: hits,
                      start: start,
                      end: end,
                      searchTextCount: searchTextCountInSlice
                    };
                  }

                  var slicesOfTitle = [];
                  if (indexOfTitle.length != 0) {
                    slicesOfTitle.push(mergeIntoSlice(title, 0, title.length, indexOfTitle));
                  }

                  var slicesOfContent = [];
                  while (indexOfContent.length != 0) {
                    var item = indexOfContent[indexOfContent.length - 1];
                    var position = item.position;
                    var word = item.word;
                    // cut out 100 characters
                    var start = position - 20;
                    var end = position + 80;
                    if(start < 0){
                      start = 0;
                    }
                    if (end < position + word.length) {
                      end = position + word.length;
                    }
                    if(end > content.length){
                      end = content.length;
                    }
                    slicesOfContent.push(mergeIntoSlice(content, start, end, indexOfContent));
                  }

                  // sort slices in content by search text's count and hits' count

                  slicesOfContent.sort(function (sliceLeft, sliceRight) {
                    if (sliceLeft.searchTextCount !== sliceRight.searchTextCount) {
                      return sliceRight.searchTextCount - sliceLeft.searchTextCount;
                    } else if (sliceLeft.hits.length !== sliceRight.hits.length) {
                      return sliceRight.hits.length - sliceLeft.hits.length;
                    } else {
                      return sliceLeft.start - sliceRight.start;
                    }
                  });

                  // select top N slices in content

                  var upperBound = parseInt('1');
                  if (upperBound >= 0) {
                    slicesOfContent = slicesOfContent.slice(0, upperBound);
                  }

                  // highlight title and content

                  function highlightKeyword(text, slice) {
                    var result = '';
                    var prevEnd = slice.start;
                    slice.hits.forEach(function (hit) {
                      result += text.substring(prevEnd, hit.position);
                      var end = hit.position + hit.length;
                      result += '<b class="search-keyword">' + text.substring(hit.position, end) + '</b>';
                      prevEnd = end;
                    });
                    result += text.substring(prevEnd, slice.end);
                    return result;
                  }

                  var resultItem = '';

                  if (slicesOfTitle.length != 0) {
                    resultItem += "<li><a href='" + articleUrl + "' class='search-result-title'>" + highlightKeyword(title, slicesOfTitle[0]) + "</a>";
                  } else {
                    resultItem += "<li><a href='" + articleUrl + "' class='search-result-title'>" + title + "</a>";
                  }

                  slicesOfContent.forEach(function (slice) {
                    resultItem += "<a href='" + articleUrl + "'>" +
                      "<p class=\"search-result\">" + highlightKeyword(content, slice) +
                      "...</p>" + "</a>";
                  });

                  resultItem += "</li>";
                  resultItems.push({
                    item: resultItem,
                    searchTextCount: searchTextCount,
                    hitCount: hitCount,
                    id: resultItems.length
                  });
                }
              })
            };
            if (keywords.length === 1 && keywords[0] === "") {
              resultContent.innerHTML = '<div id="no-result"><i class="fa fa-search fa-5x" /></div>'
            } else if (resultItems.length === 0) {
              resultContent.innerHTML = '<div id="no-result"><i class="fa fa-frown-o fa-5x" /></div>'
            } else {
              resultItems.sort(function (resultLeft, resultRight) {
                if (resultLeft.searchTextCount !== resultRight.searchTextCount) {
                  return resultRight.searchTextCount - resultLeft.searchTextCount;
                } else if (resultLeft.hitCount !== resultRight.hitCount) {
                  return resultRight.hitCount - resultLeft.hitCount;
                } else {
                  return resultRight.id - resultLeft.id;
                }
              });
              var searchResultList = '<ul class=\"search-result-list\">';
              resultItems.forEach(function (result) {
                searchResultList += result.item;
              })
              searchResultList += "</ul>";
              resultContent.innerHTML = searchResultList;
            }
          }

          if ('auto' === 'auto') {
            input.addEventListener('input', inputEventFunction);
          } else {
            $('.search-icon').click(inputEventFunction);
            input.addEventListener('keypress', function (event) {
              if (event.keyCode === 13) {
                inputEventFunction();
              }
            });
          }

          // remove loading animation
          $(".local-search-pop-overlay").remove();
          $('body').css('overflow', '');

          proceedsearch();
        }
      });
    }

    // handle and trigger popup window;
    $('.popup-trigger').click(function(e) {
      e.stopPropagation();
      if (isfetched === false) {
        searchFunc(path, 'local-search-input', 'local-search-result');
      } else {
        proceedsearch();
      };
    });

    $('.popup-btn-close').click(onPopupClose);
    $('.popup').click(function(e){
      e.stopPropagation();
    });
    $(document).on('keyup', function (event) {
      var shouldDismissSearchPopup = event.which === 27 &&
        $('.search-popup').is(':visible');
      if (shouldDismissSearchPopup) {
        onPopupClose();
      }
    });
  </script>





  

  

  

  
  

  

  

  

</body>
</html>
